The Washington Monument is an obelisk and is located on the central high ground of Capitol Square. It can be seen near the square. Sooner or later, different sunshine strikes the monument with different perceptions, which is more ornamental than the ordinary obelisk. You can go early (recommend queuing at the ticket gate near the Washington Monument at 8:30 p.m.) to collect tickets free of charge, and you can get tickets at 8:00 p.m. or 8:30 p.m. to see the sunset in Washington.